// Copyright (c) 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "base/run_loop.h"
#include "build/build_config.h"
#include "content/browser/frame_host/frame_tree.h"
#include "content/browser/site_per_process_browsertest.h"
#include "content/browser/web_contents/web_contents_impl.h"
#include "content/public/browser/devtools_agent_host.h"
#include "content/public/test/content_browser_test_utils.h"
#include "content/public/test/test_utils.h"
#include "content/shell/browser/shell.h"
#include "content/test/content_browser_test_utils_internal.h"
#include "net/dns/mock_host_resolver.h"

namespace content {

class SitePerProcessDevToolsBrowserTest
    : public SitePerProcessBrowserTest {
public:
    SitePerProcessDevToolsBrowserTest() { }
};

class TestClient : public DevToolsAgentHostClient {
public:
    TestClient()
        : closed_(false)
        , waiting_for_reply_(false)
    {
    }
    ~TestClient() override { }

    bool closed() { return closed_; }

    void DispatchProtocolMessage(
        DevToolsAgentHost* agent_host,
        const std::string& message) override
    {
        if (waiting_for_reply_) {
            waiting_for_reply_ = false;
            base::MessageLoop::current()->QuitNow();
        }
    }

    void AgentHostClosed(
        DevToolsAgentHost* agent_host,
        bool replaced_with_another_client) override
    {
        closed_ = true;
    }

    void WaitForReply()
    {
        waiting_for_reply_ = true;
        base::RunLoop().Run();
    }

private:
    bool closed_;
    bool waiting_for_reply_;
};

// Fails on Android, http://crbug.com/464993.
#if defined(OS_ANDROID)
#define MAYBE_CrossSiteIframeAgentHost DISABLED_CrossSiteIframeAgentHost
#else
#define MAYBE_CrossSiteIframeAgentHost CrossSiteIframeAgentHost
#endif
IN_PROC_BROWSER_TEST_F(SitePerProcessDevToolsBrowserTest,
    MAYBE_CrossSiteIframeAgentHost)
{
    DevToolsAgentHost::List list;
    host_resolver()->AddRule("*", "127.0.0.1");
    GURL main_url(embedded_test_server()->GetURL("/site_per_process_main.html"));
    NavigateToURL(shell(), main_url);

    // It is safe to obtain the root frame tree node here, as it doesn't change.
    FrameTreeNode* root = static_cast<WebContentsImpl*>(shell()->web_contents())->GetFrameTree()->root();

    list = DevToolsAgentHost::GetOrCreateAll();
    EXPECT_EQ(1U, list.size());
    EXPECT_EQ(DevToolsAgentHost::kTypePage, list[0]->GetType());
    EXPECT_EQ(main_url.spec(), list[0]->GetURL().spec());

    // Load same-site page into iframe.
    FrameTreeNode* child = root->child_at(0);
    GURL http_url(embedded_test_server()->GetURL("/title1.html"));
    NavigateFrameToURL(child, http_url);

    list = DevToolsAgentHost::GetOrCreateAll();
    EXPECT_EQ(1U, list.size());
    EXPECT_EQ(DevToolsAgentHost::kTypePage, list[0]->GetType());
    EXPECT_EQ(main_url.spec(), list[0]->GetURL().spec());

    // Load cross-site page into iframe.
    GURL::Replacements replace_host;
    GURL cross_site_url(embedded_test_server()->GetURL("/title2.html"));
    replace_host.SetHostStr("foo.com");
    cross_site_url = cross_site_url.ReplaceComponents(replace_host);
    NavigateFrameToURL(root->child_at(0), cross_site_url);

    list = DevToolsAgentHost::GetOrCreateAll();
    EXPECT_EQ(2U, list.size());
    EXPECT_EQ(DevToolsAgentHost::kTypePage, list[0]->GetType());
    EXPECT_EQ(main_url.spec(), list[0]->GetURL().spec());
    EXPECT_EQ(DevToolsAgentHost::kTypeFrame, list[1]->GetType());
    EXPECT_EQ(cross_site_url.spec(), list[1]->GetURL().spec());
    EXPECT_EQ(std::string(), list[0]->GetParentId());
    EXPECT_EQ(list[0]->GetId(), list[1]->GetParentId());
    EXPECT_NE(list[1]->GetId(), list[0]->GetId());

    // Attaching to both agent hosts.
    scoped_refptr<DevToolsAgentHost> child_host = list[1];
    TestClient child_client;
    child_host->AttachClient(&child_client);
    scoped_refptr<DevToolsAgentHost> parent_host = list[0];
    TestClient parent_client;
    parent_host->AttachClient(&parent_client);

    // Send message to parent and child frames and get result back.
    char message[] = "{\"id\": 0, \"method\": \"incorrect.method\"}";
    child_host->DispatchProtocolMessage(&child_client, message);
    child_client.WaitForReply();
    parent_host->DispatchProtocolMessage(&parent_client, message);
    parent_client.WaitForReply();

    // Load back same-site page into iframe.
    NavigateFrameToURL(root->child_at(0), http_url);

    list = DevToolsAgentHost::GetOrCreateAll();
    EXPECT_EQ(1U, list.size());
    EXPECT_EQ(DevToolsAgentHost::kTypePage, list[0]->GetType());
    EXPECT_EQ(main_url.spec(), list[0]->GetURL().spec());
    EXPECT_TRUE(child_client.closed());
    child_host->DetachClient(&child_client);
    child_host = nullptr;
    EXPECT_FALSE(parent_client.closed());
    parent_host->DetachClient(&parent_client);
    parent_host = nullptr;
}

IN_PROC_BROWSER_TEST_F(SitePerProcessDevToolsBrowserTest, AgentHostForFrames)
{
    host_resolver()->AddRule("*", "127.0.0.1");
    GURL main_url(embedded_test_server()->GetURL("/site_per_process_main.html"));
    NavigateToURL(shell(), main_url);

    scoped_refptr<DevToolsAgentHost> page_agent = DevToolsAgentHost::GetOrCreateFor(shell()->web_contents());

    // It is safe to obtain the root frame tree node here, as it doesn't change.
    FrameTreeNode* root = static_cast<WebContentsImpl*>(shell()->web_contents())->GetFrameTree()->root();

    scoped_refptr<DevToolsAgentHost> main_frame_agent = DevToolsAgentHost::GetOrCreateFor(root->current_frame_host());
    EXPECT_EQ(page_agent.get(), main_frame_agent.get());

    // Load same-site page into iframe.
    FrameTreeNode* child = root->child_at(0);
    GURL http_url(embedded_test_server()->GetURL("/title1.html"));
    NavigateFrameToURL(child, http_url);

    scoped_refptr<DevToolsAgentHost> child_frame_agent = DevToolsAgentHost::GetOrCreateFor(child->current_frame_host());
    EXPECT_EQ(page_agent.get(), child_frame_agent.get());

    // Load cross-site page into iframe.
    GURL::Replacements replace_host;
    GURL cross_site_url(embedded_test_server()->GetURL("/title2.html"));
    replace_host.SetHostStr("foo.com");
    cross_site_url = cross_site_url.ReplaceComponents(replace_host);
    NavigateFrameToURL(root->child_at(0), cross_site_url);

    child_frame_agent = DevToolsAgentHost::GetOrCreateFor(child->current_frame_host());
    EXPECT_NE(page_agent.get(), child_frame_agent.get());
    EXPECT_EQ(child_frame_agent->GetParentId(), page_agent->GetId());
    EXPECT_NE(child_frame_agent->GetId(), page_agent->GetId());
}

IN_PROC_BROWSER_TEST_F(SitePerProcessDevToolsBrowserTest,
    AgentHostForPageEqualsOneForMainFrame)
{
    host_resolver()->AddRule("*", "127.0.0.1");
    GURL main_url(embedded_test_server()->GetURL("/site_per_process_main.html"));
    NavigateToURL(shell(), main_url);

    // It is safe to obtain the root frame tree node here, as it doesn't change.
    FrameTreeNode* root = static_cast<WebContentsImpl*>(shell()->web_contents())->GetFrameTree()->root();
    FrameTreeNode* child = root->child_at(0);

    // Load cross-site page into iframe.
    GURL::Replacements replace_host;
    GURL cross_site_url(embedded_test_server()->GetURL("/title2.html"));
    replace_host.SetHostStr("foo.com");
    cross_site_url = cross_site_url.ReplaceComponents(replace_host);
    NavigateFrameToURL(child, cross_site_url);

    // First ask for child frame, then for main frame.
    scoped_refptr<DevToolsAgentHost> child_frame_agent = DevToolsAgentHost::GetOrCreateFor(child->current_frame_host());
    scoped_refptr<DevToolsAgentHost> main_frame_agent = DevToolsAgentHost::GetOrCreateFor(root->current_frame_host());
    EXPECT_NE(main_frame_agent.get(), child_frame_agent.get());
    EXPECT_EQ(child_frame_agent->GetParentId(), main_frame_agent->GetId());
    EXPECT_NE(child_frame_agent->GetId(), main_frame_agent->GetId());

    // Agent for web contents should be the the main frame's one.
    scoped_refptr<DevToolsAgentHost> page_agent = DevToolsAgentHost::GetOrCreateFor(shell()->web_contents());
    EXPECT_EQ(page_agent.get(), main_frame_agent.get());
}

} // namespace content
